Benchmark Experiment for Photoionized Plasma Emission from Accretion-Powered X-Ray Sources

Loisel, Guillaume; Bailey, James E.; Liedahl, D. A.; Fontes, Christopher J.; Kallman, T. R.; Nagayama, Taisuke; Hansen, Stephanie B.; Rochau, Gregory A.; Mancini, Roberto; Lee, R. W.

doi:10.1103/physrevlett.119.075001

Cited by 33 publications

(35 citation statements)

References 45 publications

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“…8: (color online) Charge state distributions for Si plasmas with L = 0.1 cm, Te = 30 eV, two electron densities (blue and black for 1 and 3 x 10 19 e/cm 3 , respectively) and three different radiation fields. Dotted lines represent a good fit to experimental emission and absorption data from [28]. Figure 8 shows modeled charge state distributions for six sets of plasma conditions along with a dotted line representing a good fit to the experimental data from [28].…”

Section: Steady-state Simentioning

confidence: 95%

“…Dotted lines represent a good fit to experimental emission and absorption data from [28]. Figure 8 shows modeled charge state distributions for six sets of plasma conditions along with a dotted line representing a good fit to the experimental data from [28]. All results here are from the thinnest plasma (0.1 cm in length) at the lowest requested temperature (30 eV).…”

Section: Steady-state Simentioning

confidence: 96%

“…The steady-state Si cases were designed to be relevant to the benchmark photoionization emission and absorption measurements described in [28]. The major puzzle of this experiment was that multiple models predicted a higher ionization for the inferred plasma conditions than was implied by the absorption spectrum.…”

Section: Steady-state Simentioning

confidence: 99%

“…The measured absorption spectra indicated charge state distributions that peak around Be-like Si 10+ , while the measured emission was dominated by Li-like Si 11+ . However, both the ATOMIC [12] and XSTAR [40] models used to model the emission in [28] predicted emission and absorption dominated by He-like Si 12+ . To fit the measured spectra, both models had to decrease the temperature and/or increase the density to enhance collisional recombination.…”

Section: Steady-state Simentioning

confidence: 99%

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Review of the 10th Non-LTE code comparison workshop

Hansen

Chung

Fontes

et al. 2020

High Energy Density Physics

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We report on the results of the 10 th Non-LTE code comparison workshop, which was held at the University of San Diego campus November 28 through December 1, 2017. Non-equilibrium collisionalradiative models predict the electronic state populations and attendant emission and absorption characteristics of hot, dense matter and are used to help design and diagnose high-energy-density experiments. At this workshop, fifteen codes from eleven institutions contributed results for steady-state and time-dependent neon, aluminum, silicon, and chlorine cases relevant to a variety of high-density experimental and radiation-driven astrophysical systems. This report focuses on differences in the predictions from codes with different internal structure, completeness, density effects, and rate fidelity and the impact of those differences on hot, dense plasma diagnostics.

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Section: Steady-state Simentioning

confidence: 95%

Section: Steady-state Simentioning

confidence: 96%

Section: Steady-state Simentioning

confidence: 99%

Section: Steady-state Simentioning

confidence: 99%

See 2 more Smart Citations

Review of the 10th Non-LTE code comparison workshop

Hansen

Chung

Fontes

et al. 2020

High Energy Density Physics

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“…The xillver models account for Auger decay of the line by computing the branching ratios for Auger vs. fluorescent emission but do not account for resonant Auger scattering. Loisel et al (2017), however, suggest through laboratory experiments that in the conditions expected within the accreting plasma, resonant Auger destruction of fluorescent lines is not as important as originally anticipated.…”

Section: Full Spectral Responsementioning

confidence: 78%

Venturing beyond the ISCO: detecting X-ray emission from the plunging regions around black holes

Wilkins

Reynolds

Fabian

2020

Monthly Notices of the Royal Astronomical Society

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We explore how X-ray reverberation around black holes may reveal the presence of the innermost stable circular orbit (ISCO), predicted by General Relativity, and probe the dynamics of the plunging region between the ISCO and the event horizon. Being able to directly detect the presence of the ISCO and probe the dynamics of material plunging through the event horizon represents a unique test of general relativity in the strong field regime. X-ray reverberation off of the accretion disc and material in the plunging region is modelled using general relativistic ray tracing simulations. Xray reverberation from the plunging region has a minimal effect on the time-averaged X-ray spectrum and the overall lag-energy spectrum, but is manifested in the lag in the highest frequency Fourier components, above 0.01 c 3 (GM ) −1 (scaled for the mass of the black hole) in the 2-4 keV energy band for a non-spinning black hole or the 1-2 keV energy band for a maximally spinning black hole. The plunging region is distinguished from disc emission not just by the energy shifts characteristic of plunging orbits, but by the rapid increase in ionisation of material through the plunging region. Detection requires measurement of time lags to an accuracy of 20 per cent at these frequencies. Improving accuracy to 12 per cent will enable constraints to be placed on the dynamics of material in the plunging region and distinguish plunging orbits from material remaining on stable circular orbits, confirming the existence of the ISCO, a prime discovery space for future X-ray missions.

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Photon–Atom Interactions: Intermediate Energies

Bromley

2023

Springer Handbooks

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Benchmark Experiment for Photoionized Plasma Emission from Accretion-Powered X-Ray Sources

Cited by 33 publications

References 45 publications

Review of the 10th Non-LTE code comparison workshop

Review of the 10th Non-LTE code comparison workshop

Venturing beyond the ISCO: detecting X-ray emission from the plunging regions around black holes

Photon–Atom Interactions: Intermediate Energies

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